| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * Oak Generic NCR5380 driver |
| 4 | * |
| 5 | * Copyright 1995-2002, Russell King |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/ioport.h> |
| 10 | #include <linux/blkdev.h> |
| 11 | #include <linux/init.h> |
| 12 | |
| 13 | #include <asm/ecard.h> |
| 14 | #include <asm/io.h> |
| 15 | |
| 16 | #include <scsi/scsi_host.h> |
| 17 | |
| 18 | #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) |
| 19 | |
| 20 | #define NCR5380_read(reg) readb(hostdata->io + ((reg) << 2)) |
| 21 | #define NCR5380_write(reg, value) writeb(value, hostdata->io + ((reg) << 2)) |
| 22 | |
| 23 | #define NCR5380_dma_xfer_len NCR5380_dma_xfer_none |
| 24 | #define NCR5380_dma_recv_setup oakscsi_pread |
| 25 | #define NCR5380_dma_send_setup oakscsi_pwrite |
| 26 | #define NCR5380_dma_residual NCR5380_dma_residual_none |
| 27 | |
| 28 | #define NCR5380_queue_command oakscsi_queue_command |
| 29 | #define NCR5380_info oakscsi_info |
| 30 | |
| 31 | #define NCR5380_implementation_fields /* none */ |
| 32 | |
| 33 | #include "../NCR5380.h" |
| 34 | |
| 35 | #undef START_DMA_INITIATOR_RECEIVE_REG |
| 36 | #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) |
| 37 | |
| 38 | #define STAT ((128 + 16) << 2) |
| 39 | #define DATA ((128 + 8) << 2) |
| 40 | |
| 41 | static inline int oakscsi_pwrite(struct NCR5380_hostdata *hostdata, |
| 42 | unsigned char *addr, int len) |
| 43 | { |
| 44 | u8 __iomem *base = hostdata->io; |
| 45 | |
| 46 | printk("writing %p len %d\n",addr, len); |
| 47 | |
| 48 | while(1) |
| 49 | { |
| 50 | int status; |
| 51 | while (((status = readw(base + STAT)) & 0x100)==0); |
| 52 | } |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | static inline int oakscsi_pread(struct NCR5380_hostdata *hostdata, |
| 57 | unsigned char *addr, int len) |
| 58 | { |
| 59 | u8 __iomem *base = hostdata->io; |
| 60 | |
| 61 | printk("reading %p len %d\n", addr, len); |
| 62 | while(len > 0) |
| 63 | { |
| 64 | unsigned int status, timeout; |
| 65 | unsigned long b; |
| 66 | |
| 67 | timeout = 0x01FFFFFF; |
| 68 | |
| 69 | while (((status = readw(base + STAT)) & 0x100)==0) |
| 70 | { |
| 71 | timeout--; |
| 72 | if(status & 0x200 || !timeout) |
| 73 | { |
| 74 | printk("status = %08X\n", status); |
| 75 | return -1; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | if(len >= 128) |
| 80 | { |
| 81 | readsw(base + DATA, addr, 128); |
| 82 | addr += 128; |
| 83 | len -= 128; |
| 84 | } |
| 85 | else |
| 86 | { |
| 87 | b = (unsigned long) readw(base + DATA); |
| 88 | *addr ++ = b; |
| 89 | len -= 1; |
| 90 | if(len) |
| 91 | *addr ++ = b>>8; |
| 92 | len -= 1; |
| 93 | } |
| 94 | } |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | #undef STAT |
| 99 | #undef DATA |
| 100 | |
| 101 | #include "../NCR5380.c" |
| 102 | |
| 103 | static const struct scsi_host_template oakscsi_template = { |
| 104 | .module = THIS_MODULE, |
| 105 | .name = "Oak 16-bit SCSI", |
| 106 | .info = oakscsi_info, |
| 107 | .queuecommand = oakscsi_queue_command, |
| 108 | .eh_abort_handler = NCR5380_abort, |
| 109 | .eh_host_reset_handler = NCR5380_host_reset, |
| 110 | .can_queue = 16, |
| 111 | .this_id = 7, |
| 112 | .sg_tablesize = SG_ALL, |
| 113 | .cmd_per_lun = 2, |
| 114 | .dma_boundary = PAGE_SIZE - 1, |
| 115 | .proc_name = "oakscsi", |
| 116 | .cmd_size = sizeof(struct NCR5380_cmd), |
| 117 | .max_sectors = 128, |
| 118 | }; |
| 119 | |
| 120 | static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) |
| 121 | { |
| 122 | struct Scsi_Host *host; |
| 123 | int ret; |
| 124 | |
| 125 | ret = ecard_request_resources(ec); |
| 126 | if (ret) |
| 127 | goto out; |
| 128 | |
| 129 | host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); |
| 130 | if (!host) { |
| 131 | ret = -ENOMEM; |
| 132 | goto release; |
| 133 | } |
| 134 | |
| 135 | priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), |
| 136 | ecard_resource_len(ec, ECARD_RES_MEMC)); |
| 137 | if (!priv(host)->io) { |
| 138 | ret = -ENOMEM; |
| 139 | goto unreg; |
| 140 | } |
| 141 | |
| 142 | host->irq = NO_IRQ; |
| 143 | |
| 144 | ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP); |
| 145 | if (ret) |
| 146 | goto out_unmap; |
| 147 | |
| 148 | NCR5380_maybe_reset_bus(host); |
| 149 | |
| 150 | ret = scsi_add_host(host, &ec->dev); |
| 151 | if (ret) |
| 152 | goto out_exit; |
| 153 | |
| 154 | scsi_scan_host(host); |
| 155 | goto out; |
| 156 | |
| 157 | out_exit: |
| 158 | NCR5380_exit(host); |
| 159 | out_unmap: |
| 160 | iounmap(priv(host)->io); |
| 161 | unreg: |
| 162 | scsi_host_put(host); |
| 163 | release: |
| 164 | ecard_release_resources(ec); |
| 165 | out: |
| 166 | return ret; |
| 167 | } |
| 168 | |
| 169 | static void oakscsi_remove(struct expansion_card *ec) |
| 170 | { |
| 171 | struct Scsi_Host *host = ecard_get_drvdata(ec); |
| 172 | void __iomem *base = priv(host)->io; |
| 173 | |
| 174 | ecard_set_drvdata(ec, NULL); |
| 175 | scsi_remove_host(host); |
| 176 | |
| 177 | NCR5380_exit(host); |
| 178 | scsi_host_put(host); |
| 179 | iounmap(base); |
| 180 | ecard_release_resources(ec); |
| 181 | } |
| 182 | |
| 183 | static const struct ecard_id oakscsi_cids[] = { |
| 184 | { MANU_OAK, PROD_OAK_SCSI }, |
| 185 | { 0xffff, 0xffff } |
| 186 | }; |
| 187 | |
| 188 | static struct ecard_driver oakscsi_driver = { |
| 189 | .probe = oakscsi_probe, |
| 190 | .remove = oakscsi_remove, |
| 191 | .id_table = oakscsi_cids, |
| 192 | .drv = { |
| 193 | .name = "oakscsi", |
| 194 | }, |
| 195 | }; |
| 196 | |
| 197 | static int __init oakscsi_init(void) |
| 198 | { |
| 199 | return ecard_register_driver(&oakscsi_driver); |
| 200 | } |
| 201 | |
| 202 | static void __exit oakscsi_exit(void) |
| 203 | { |
| 204 | ecard_remove_driver(&oakscsi_driver); |
| 205 | } |
| 206 | |
| 207 | module_init(oakscsi_init); |
| 208 | module_exit(oakscsi_exit); |
| 209 | |
| 210 | MODULE_AUTHOR("Russell King"); |
| 211 | MODULE_DESCRIPTION("Oak SCSI driver"); |
| 212 | MODULE_LICENSE("GPL"); |
| 213 | |